test: improve coverage for load hooks

Refs: https://github.com/nodejs/node/pull/43363#discussion_r894366025

PR-URL: https://github.com/nodejs/node/pull/43374
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jacob Smith <jacob@frende.me>
Reviewed-By: Geoffrey Booth <webadmin@geoffreybooth.com>
Reviewed-By: Akhil Marsonya <akhil.marsonya27@gmail.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/test/es-module/test-esm-loader-thenable.mjs b/test/es-module/test-esm-loader-thenable.mjs
new file mode 100644
index 0000000000..c8c3ec2778
--- /dev/null
+++ b/test/es-module/test-esm-loader-thenable.mjs
@@ -0,0 +1,65 @@
+import { mustCall } from '../common/index.mjs';
+import { fileURL, path } from '../common/fixtures.mjs';
+import { match, ok, notStrictEqual, strictEqual } from 'assert';
+import { spawn } from 'child_process';
+import { execPath } from 'process';
+
+{
+  const child = spawn(execPath, [
+    '--experimental-loader',
+    fileURL('es-module-loaders', 'thenable-load-hook.mjs').href,
+    path('es-modules', 'test-esm-ok.mjs'),
+  ]);
+
+  let stderr = '';
+  child.stderr.setEncoding('utf8');
+  child.stderr.on('data', (data) => {
+    stderr += data;
+  });
+  child.on('close', mustCall((code, _signal) => {
+    strictEqual(code, 0);
+    ok(!stderr.includes('must not call'));
+  }));
+}
+
+{
+  const child = spawn(execPath, [
+    '--experimental-loader',
+    fileURL('es-module-loaders', 'thenable-load-hook-rejected.mjs').href,
+    path('es-modules', 'test-esm-ok.mjs'),
+  ]);
+
+  let stderr = '';
+  child.stderr.setEncoding('utf8');
+  child.stderr.on('data', (data) => {
+    stderr += data;
+  });
+  child.on('close', mustCall((code, _signal) => {
+    notStrictEqual(code, 0);
+
+    match(stderr, /\sError: must crash the process\r?\n/);
+
+    ok(!stderr.includes('must not call'));
+  }));
+}
+
+{
+  const child = spawn(execPath, [
+    '--experimental-loader',
+    fileURL('es-module-loaders', 'thenable-load-hook-rejected-no-arguments.mjs').href,
+    path('es-modules', 'test-esm-ok.mjs'),
+  ]);
+
+  let stderr = '';
+  child.stderr.setEncoding('utf8');
+  child.stderr.on('data', (data) => {
+    stderr += data;
+  });
+  child.on('close', mustCall((code, _signal) => {
+    notStrictEqual(code, 0);
+
+    match(stderr, /\sundefined\r?\n/);
+
+    ok(!stderr.includes('must not call'));
+  }));
+}